If you need to insure the item (out value) measurement, confirmed at the start of process capability and products in the standard have been produced by statistical process control.
If an item of measured value (the value is out), is confirmed the rise at the time of process capability, require that the products in the standard to ensure a statistical process control that is being produced.
The measured value (value) at the rising edge of the process capability is confirmed, that is in the standard product is produced when it is necessary to ensure that the statistical process control.